147. Diagram shows three concentric conducting spherical shells having Redii R ,2R and 3R. the initial potential of each shell is as mentioned in figure . choose the correct option 1. if the inneed shell is earthed, charge present on its surface would be zero. 2. if the outer shell is earthed then potential of middle would be 5 volt. 3. if the inner and outer most shells are shorted then potential of middle one would be 10 volt. 4. if the inner and Middle is shorted then energy stored in a space between these would be zero ?